Renewable fuse



July 33, 1923n 1,463,756

W. M. WETTER RENEWABLE FUS E Filed July 15, 1922 @Hof/waage Patented july 3l., 1923o UNITED STATES intatte oFFIcEe WILLIAM M. WETTER, 0F WLVLLMSRT, PENlSYLVAT-Lh, SSIGNB @F @NE-HALF TO LOUIS G. HLING, @E WILLEMSPURT, EXNSY'LVM'.

RENEWAB'LE Application flied July 'A3, iSlf-B. Serial Etc. /ilyt.

To aZZwmm it may conocen:

Be it known that ll, WILLIAM M. Wn'rfrnn, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Renewable Fuses; and l do declare the -following to be a full, clear, and enact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in renewable fuses and more particularlyv to those of the type having an indicator which automatically comes into play when the fuse is blown, to indicate its condition without the necessity ot inspecting its interior.

'lllhe principal object ot the invention is to provide novelv means Jfor holding the in dicator against detachment troni the fuse body until theiuse wire or ythe like has blown, provision being made however wliere- Y by said indicator niaythen be quickly easil lremoved so that a new tuse wire maT y be attached thereto. for substitution in place ot the blown fuse.

With the foregoing in view, the invention resides in the novel subject matter herein-` after described and claimed, the description being supplemented by the accompanying drawings.

Figure l is ya longitudinal sectional view ot a' fuse constructed in accordancewith invention.

`rligure -2 is a duplicateot Figure l with the exception that it illustrates the condition oit the fuse when the fuse wire has blown.,

Figure 3 is a sectional view at right angles to Figures l and 2;

F'gure e is a transverse section on line 4-4 of Figure 2.

Figure 5 is a perspective view et the in dicator. K

Figure 6 is a perspective view 'tor the indicaton ln the drawings above brieflydescribed, .the numeral l designates a-.hollowbcdy of insulation provided at one end with re# movable cap or other closure 2 which vpreterably includes a centrally apertured disk ot insulation. The other end of the body i ci the grido is surrounded. by a .threaded sleeve adapted to be engaged with the shell of an ordinary' fuse plug socket. @ut of electrical engagement with the sleeve the last :neng

- rco beyond tioned end ot the body l is provided with a central contact 5, `for engagement with the usual contact ci' the socket, said contact 5 being here shown in the form of a binding screw. Adjacent this screw, the body l is termed with a guide eye 6 through which a renewable fuse wire 7 extends', the outer end of said wire seing bound under the head ci the screw 5, while the inner end of said wire is detachably connected with 'the inner end of an indicating rod 8 .which passes slidably through the central aperture of the disk 3. The inner end ot rod 8 is by erence provided with head 9 and the wire is clamped against said head hy a bind' o screw l0. linnen the fuse is thus held place, the rod d is held in a retracted position, against the action et a coiled spri ll, one end this spring being connected y any suitable manner with the rod while its other end reacts against a guide bracket which is mounted within the shell l, being in electrical engagement with the sleeve bv eens et a screw 13; Bracket l2 is 'forme/,4 wish an'cp ning il and with reduced throat i5 leading from said opening through one end et said bracket, and the inner end of the indicating rod 8 is provided wit" sides of the neck i@ with` the sides et throat l5. @rdinarily however when Yituse 7 is inta-c he indicating roei held in the position shown in Figure l the neck 16 is below the throat that rod' 8 cannot ecome disconnected the h acket l2. As soon as the Yfuse w e T 1 clown-he sprintf i? projects the in A`i the levicenl ay readily be seen w ininim1 its interior. Then, by re .nd properly nianieulatingn he neck l@ ci the latJ fhout e t ,D rac l peri-"inciting the entire rod to he moved from the body i. The Yinse wire are now e screws -5 and l0* anc a no. .be secured against 'the head by loosening en tuse wire mayl e the rod is removed troni the body,

iis operation be performs ie rod and inse are ne cap 2 so that the condit on nected with saidbody,

with the bracket l2 and forced inwardly to the desired extent against Athe tension of the spring l1, the free end of the fuse 7 is secured under the head of the 'screw 5, so that vsaid fuse preventsprojection of ythe indicatpreferably followed, but Withinthe scope of the invention as claimed, numerous minor changes'may be made. l

I claim: l 1.l A circuit cut-out Comprisinga body, a self-acting indicator carried by said body, a fuse connected detachably with said indicator at'a point Within the body and normally1 holding said indicator against operation, said fuse being also detachably conand a detachable ,connection separate from the fuse connecting said'indicator with said'body and releasable only when the )fuse has blown. y

Q2. A circuitv cut-out comprising a body having spaced contacts, a removable selfacting indicator havinga portion in. said lbody in electrical connection Withone olf preventingmovement of said indicator in f said manner until blown, said fuse being detachably connected Withsaid indicator at a point Within the body and being connected 'to the other of said contacts by| a detachable connection accessible of the body. y

3. A circuit cut-out comprising a hollovsT from the exterior able closure, a guide secured in said body having an opening and a restricted throat leading thereto from the exterior' of-s'aid guide, a spring-actuated rod passing slid-- ably through said cover and guide and having a restricted neck permitting removal from said guide through 'said throat, and a fuse detachably connected to said rod at a pointwithin said body, "said fuse being yanchored detachably to one of said contacts and normally holding said `rod retracted With its neck spaced from said throat, said- 4guide being 1n electrical engagement with the other of said contacts.

In testimony whereof I have hereunto affixed my signature.

WILLIAM l M, WETTER` Abody having spaced contacts and a remov-- i 

